Space After New Lines in RichTextBox

问题

A RichTextBox puts extra space between lines when a user presses enter or inserts text, and that's what I'm trying to get away from. I searched around and the only decent solution I found is this one:

Setter SetParagraphMargin = new Setter();
SetParagraphMargin.Property = Paragraph.MarginProperty;
SetParagraphMargin.Value = new Thickness(0);

Style style = new Style();
style.TargetType = typeof(Paragraph);
style.Setters.Add(SetParagraphMargin);

rtb.Resources.Add("Style", style);

But this still doesn't work. Does anyone have any tips for me?

回答1:

I had the same problem, and i solved it by modifying the Xaml of the RichTextBox:

<RichTextBox>
    <RichTextBox.Resources>
        <Style TargetType="{x:Type Paragraph}">
            <Setter Property="Margin" Value="0"/>
        </Style>
    </RichTextBox.Resources>
</RichTextBox>

Don't know how that's different than setting the style manually like you did, but for me it worked.

Update: To change it in code, you need to use the target type as key:

Style noSpaceStyle = new Style(typeof(Paragraph));
noSpaceStyle.Setters.Add(new Setter(Paragraph.MarginProperty, new Thickness(0)));
rtb.Resources.Add(typeof(Paragraph), noSpaceStyle);

回答2:

I did it with property thickness

 my_paragraph.Margin = new System.Windows.Thickness(0);

来源：https://stackoverflow.com/questions/9897582/space-after-new-lines-in-richtextbox